prevent -- replace by sphinx, sort images

.gitlab-ci.yml

@@ -27,7 +27,8 @@ pages:
     - if: $CI_COMMIT_BRANCH == "docs"
   image: python:3.10
   script:
-    - mv image_list* source/user_guide/
+    - mv image_list.rst source/user_guide/
+    - cat image_list.csv | sort | sed "s/--/-\\\-/g" >  source/user_guide/image_list.csv
     - apt-get update && apt-get install -y python3-dev graphviz libgraphviz-dev 
     - pip install -r requirements.txt
     - make html